Principle and process of lead-acid battery repair

Lead-acid battery is a kind of battery. With its low price and good high-rate discharge performance, it is widely used, such as automobiles, motorcycles, trains, ships, communications and UPS, etc. All need to use lead-acid batteries. So, do you know what kind of process is the principle and process of lead-acid battery repair? Today, the author will introduce to you, let's take a look.　　 Lead storage battery is composed of positive plate group, negative plate group, electrolyte and container. The principle and process of lead-acid battery repair is tan lead dioxide (PbO2), and the negative plate is gray velvet lead (Pb). When the two plates are placed in an aqueous solution of sulfuric acid (H2SO4) with a concentration of 27% to 37% , The lead of the electrode plate and sulfuric acid chemically react, and the divalent lead positive ion (Pb2+) is transferred to the electrolyte, leaving two electrons (2e-) on the negative plate. Due to the attraction of the positive and negative charges, the positive lead ions gather around the negative plate, and the positive plate has a small amount of lead dioxide (PbO2) infiltrated into the electrolyte under the action of water molecules in the electrolyte, and the divalent oxygen ions are combined with hydration. , Which makes lead dioxide molecules into a dissociable unstable substance-lead hydroxide [Pb(OH4]).　　　　 Lead hydroxide is composed of tetravalent lead positive ions (Pb4+) and 4 hydroxide radicals [4(OH)-]. The tetravalent lead positive ions (Pb4+) remain on the positive plate, making the positive plate positively charged. Since the negative plate is negatively charged, a certain potential difference is generated between the two plates, which is the electromotive force of the battery. When the external circuit is connected, the current flows from the positive pole to the negative pole. During the discharge process, the electrons on the negative plate continuously flow to the positive plate through the external circuit. At this time, the sulfuric acid molecules are ionized into hydrogen positive ions (H+) and sulfate negative ions (SO42-) in the electrolyte under the action of the ion electric field force. , The two ions move to the positive and negative electrodes respectively. After reaching the negative plate, the sulfate anion combines with the lead positive ions to form lead sulfate ((PbSO4). On the positive plate, due to the inflow of electrons from the external circuit, it interacts with the tetravalent lead positive The ions (Pb4+) are chemically synthesized into divalent lead positive ions (Pb2+), and immediately combine with the sulfate negative ions near the positive plate to form lead sulfate and attach to the positive electrode. Through the author’s introduction, I believe everyone also has a good understanding of the principle and process of lead-acid battery repair. After a certain understanding, I hope the introduction of the author can bring you some help. Previous: Where is the battery good?